Thursday, December13, 2018 L-36.com


Marine Weather and Tides
Chico, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:19AMSunset 4:45PM Thursday December 13, 2018 11:41 AM PST (19:41 UTC) Moonrise 11:49AMMoonset 10:43PM Illumination 37% Phase: Waxing Crescent; Moon at 6 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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7 Day Forecast for Marine Location Near Chico, CA
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location: 39.75, -121.84     debug


Area Discussion for - Sacramento, CA
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Fxus66 ksto 131207
afdsto
area forecast discussion
national weather service sacramento ca
407 am pst Thu dec 13 2018

Synopsis
Dry weather today and tonight with areas of valley fog. Light rain
spreading over the north state Friday with breezy south winds and
light snow over the mountains. A moderate storm system moves
through norcal late Sunday into Monday with mountain travel
impacts likely. Minimal weather impacts the remainder of the week.

Discussion
Upper ridging over the west coast for dry conditions this morning
with just some high cloudiness spilling through the ridge. Light
winds in the central and northern sacramento valley precluding
morning fog there but lighter winds from about sacramento
southward allowing for some areas of morning fog in the southern
sacramento and northern san joaquin valleys. Upper ridge will keep
precipitation out of the region through tonight but increasing
cloud cover should keep fog to a minimum Friday morning. Models
fairly consistent on timing of next pacific frontal passage
through norcal on late Friday and Friday night. The precipitable
water plume associated with this system is not particularly
moisture with PV values of about 3 4 inch predicted. Therefore,
qpf values and snow amounts with this system are not very high and
impacts associated with the system are minimal. Most areas will
see breezy south winds ahead of this system Friday afternoon with
the highest winds over the mountains where gusts in the 30 and 40
mph are predicted.

Both ECMWF and GFS keep lingering showers over the CWA on Saturday
as a upper shortwave and lingering moisture combine to produce
isolated showers over at least the northern portions of the
forecast area. Next, moister pacific frontal system currently
forecast to start pushing into norcal mid day Sunday. Precipitable
water values feeding this system forecast at well over an inch so
this should be a much better precipitation producer.

Models still handling this system differently as it moves inland
with GFS still splitting the system taking bulk of precipitation
south of the forecast area while ECMWF keeps a more consolidated
solution taking heaviest precip through the central part of the
state. This difference makes precipitation quantity forecasting
and even timing very tricky. For this morning, weighed heavily on
wpc solution which seemed to use a middle ground approach. Snow
levels below 7000 feet translate to at least several inches of
snow over the passes Sunday through Monday so mountain impacts
are likely. Which ever model scenario works out best, most
precipitation should be moving into the sierra by Monday morning.

.Extended discussion (Monday through Thursday)
a low pressure system will be passing over northern california
early Monday morning bringing rain and mountain snow to the
region. The bulk of the precipitation is forecast to fall between
midnight and 9am with showers expected for the afternoon. There is
some uncertainty as to what will happen for the rest of the week
as the ECMWF and the GFS vastly differ. The ECMWF tries to push
another system into northwest california, which would clip our
most northern counties; however, the GFS supports ridging over the
area. If the GFS pans out, we'd likely see drier and warmer
weather with the potential for some valley fog. Models then try to
come back into agreement for Thursday Friday with both having a
weak system advance towards the region. The GFS seems to be faster
and lighter while the ECMWF is slower and brings the precip in on
Friday.

Aviation
High clouds are streaming over northern california this morning
withVFR conditions prevailing at most of the TAF sites. MVFR to
ifr conditions will remain possible for areas south of ksac, but
the high cloud may limit fog development. Once the morning clouds
exit the region, any fog that developed will dissipate.

Sto watches warnings advisories
None.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chico Municipal Airport, CA3 mi54 minN 010.00 miA Few Clouds54°F35°F51%1027.4 hPa
Oroville Municipal Airport, CA21 mi48 minW 410.00 miFair53°F39°F59%1027.9 hPa

Wind History from CIC (wind in knots)
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Last 24hrNW11NW13
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--NW16NW13NW8NW10NW10--CalmCalmCalmE5E3SE3CalmCalmCalmE4NE5NW5NE5W3Calm
1 day agoSE6SE8SE10SE8SE10SE8E5E5--SE5SE9SE7SE6SE6E3CalmCalmNE6NE7CalmNW5NW5NW5N6
2 days agoNW12NW16NW15NW15NW15NW10NW12NW10--N6CalmN3CalmCalmCalmCalmCalmCalmCalmCalmCalmSE3--Calm

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
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Thu -- 06:34 AM PST     -0.02 feet Low Tide
Thu -- 07:15 AM PST     Sunrise
Thu -- 11:45 AM PST     Moonrise
Thu -- 12:13 PM PST     2.34 feet High Tide
Thu -- 04:45 PM PST     Sunset
Thu -- 06:51 PM PST     0.79 feet Low Tide
Thu -- 10:20 PM PST     2.30 feet High Tide
Thu -- 10:44 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.11.71.20.80.40.1000.311.62.12.32.321.71.310.80.81.11.82.32.3

Tide / Current Tables for Clarksburg #4, Sacramento River, California
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Clarksburg #4
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Thu -- 05:04 AM PST     -0.02 feet Low Tide
Thu -- 07:14 AM PST     Sunrise
Thu -- 11:04 AM PST     2.34 feet High Tide
Thu -- 11:45 AM PST     Moonrise
Thu -- 04:45 PM PST     Sunset
Thu -- 05:21 PM PST     0.79 feet Low Tide
Thu -- 09:11 PM PST     2.30 feet High Tide
Thu -- 10:44 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.10.60.30.1-00.10.61.21.82.22.32.221.61.20.90.80.91.422.32.32.1

Weather Map and Satellite Images
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wmap_P
GOES Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Sacramento, CA (14,3,4,5)
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Ground Weather Radar Station Beal AFB, CA
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.